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Letters .Patent No. 78,873, dated June 16, 1868.

IMPROVEMENT IN consumo iur-"LUX AND .VENT-valves.

@in hnelt nient it im time Entert @met mit mating met at the 5min.

'ro ALL WHQM 1T MAY eoNeneN:

Be it known that I, J. H. Gr. IIAWES, of Newark, in the county of Essex, and State of New Jersey, have invented a new Combination of Valves; and I do hereby declare that the following is a full and exentdescriptionl of lthe same, reference being had to the accompanying drawings, and to the letters oi'freference marked thereon. l I i My invention consists in producing a. eombinationof valv`es, in such a manneras effectually to prevent`collapse invboilers or other 'closed vessels, and preventing siphonic action through 'the supply-pipes.

lIt will be seen thatligure 1 shows the parts relatively. A is the outer service-pipe,`through which the water 'p'usses to the boiler'or other vessel for use, either for generating steam er for heating the'water. By the pressure of the water inward, the valve C is raised from itsseat, B,'and the water passes'on to the boiler,'but in case the pressure ceases, the supply diminishing or being cut 0E from the pipe A, Vthe valve C drops down to the seat B, and prevents the return of any water from beyond the point D;. th'en, if from any Acause a vacuum should be produced-beyond the .point D, the valve C is closed, and the draught is upon the valve E, which is ordinarily held closed by the spring F. The draught causes the opening of the valves E, and tlie air rushes in at thepoint-G, through the lvalve E, into andrbeyond the service-pipe D, and prevents a collapse. i

Thusthese valves, ranking a. combina-tion, .are a.constant guard against lcollapse in boilers or'other vessels for a. similar use.

I ein aware of the patent 'to J. St'iven,lfo'r an air-valvejfor steam-apparatus,dated August 5, 18.62, but

said device iswholly useless. for the purposes of;my invention. He employs a. single cylindrical valve, which rnoves to and from two seats, whereby air is admitted into or cut voff-from the steam-apparatus. New when steaml islet on'and rises above the pressure of the atmosphere, it raises the valve, closes the seat above it, and shuts off th'eair. The steam condenses within the cup, 'and passes oi accordingly.-

'But in my device the water iiows'valeng` to the boiler in a'continuou's stream, until it is cut ofi o1' stops from any cause, then-the valve C falls by its gravity. If A'zt-vacuum is formed, ,the valveE opens, and air rushes into pipe D, and thuslprevents a collapse. 4

'There are no means Iprovided for in Stivous for acontiuuous ow or passage of" steam; on the contrary,

'i -it merely passes into the tube at the bottom of thereservoir and then condenlses.

VpSince there are two important functions to be performed bythe valves, it is important that they be separate and distinct, because one is open and the other is shut, andatherefore the two should not be connected, so that if one is derungedor inoperative, there is still dependence on the other. l

I claim the arrangement with the pipeA D of 'the two yvalves C E, separate and .independent of each other, adapted to operate substantially' as and for the purpose described.

J. H. G. HAWES.

Witnesses: l A

Henson HARRIS, R. B. YARD.' 

